Simple selection of pearl oysters Pinctada fucata martensii with strong shell-closing strength using near-infrared spectroscopy
2010
Fujiwara, T., Mie-ken. Industrial Research Inst., Tsu (Japan) | Aoki, H. | Ishikawa, T. | Atsumi, T. | Nishikawa, H. | Kamiya, N. | Komaru, A.
Shell-closing strength (SCS) has been reported to be a useful indicator for selecting pearl oysters with a high survival rate in summer. The objective of the present study was to determine the suitability of near-infrared (NIR) spectroscopy to select pearl oysters with strong SCS. The SCS of Japanese lineage, Vietnamese lineage and a hybrid between Japanese and Chinese lineages showed a positive significant relationship with protein content and a negative significant relationship with moisture of soft tissue. Therefore, protein and moisture contents were found to be indicators of pearl oyster health as well as SCS. The spectra of intact pearl oysters of three lineages collected in 2008 were acquired using a portable NIR spectrophotometer. Second-derivative NIR spectra and multiple regression analysis were used to develop the calibration equations for protein and moisture contents. The predicted protein and moisture contents of pearl oysters collected in 2009 using the calibration equations showed sufficient accuracy for the selection of oysters with strong SCS. In conclusion, we propose that NIR spectroscopy is useful for monitoring SCS for the preliminary selection of pearl oysters in a breeding program.
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